Sewage-ejector.



W. MCCLINTOCK.

SEWAGE EJECTOR. APPLICATION FILED 05c. 29. 1915.

1,279,735. Patented Sept. 24,1918.

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UNITED sra'rns PATENT .QFFIGE.

WILLIAM. MCQLINIQCK, on. NEW YQRK,:51\T..'Y.

.SE-WAGE-EJECTOR.

' To all whom it mag concern:

Be it knownthat I, lViLLIAMMGCLiN-TOGK, a citizen of the United States, and a resident of New York, county and State of New York, have invented certain new and useful Improvements in Sewage-Ejectors, of which the following is a specification, reference being had to the accompanying drawings, forming a partthereof.

My invention relates to improvements in ejectors which employ compressed air for scribe a preferred form of mechanism embodying the invention, the novel features of which will be set forth in appended claims.

Referring to the drawings:

Figure 1 is a sectionalelevation of a sewage tank and its connections, with which is shown in elevation, an ejector which embodies my invention.

Fig. 2 is a longitudinal section of the ejector.

Fig. 3 is a transverse section of the apparatus shown inFig. 2 the section being taken on the line 33 of the latter figure.

Fig. 4: is a transverse sectionon the line 4.-4 of Fig. 2, and Fig. 5 is a similar section on the line 55 of-the same figure.

Fig, 6 shows a detail of the construction,

this figure being an elevation of the actuating levers.

Like characters of reference designate corresponding parts in all the figures.

10 designates a closed tank or receptacle into which sewage orwater or othe'r similar material is discharged from an inlet ll through an inwardly opening check valve 12. This material is to be discharged in a manner which will be set forth fully herein through an outwardly opening check-valve 13 and a discharge pipe 14.

Inside of the tank is a float 15 which is preferably provided with a filler cap 16, as shown, so that it may be partly filled with water if desired, for the purpose of regulating its buoyancy. This-float is movable Specification of Letters Batent. Patented Sept, 24 ,19-18 Application filed December 29,1915.

Serial No. 69,222.

on a vertical rod 17 which is guided in the top of the tank and in a bracket l8 on which the float rests when thetank is empty. This rod is also movable vertically and is provided with fixed stops 19-19 by means of which it is actuated by the float.

The ejector valve comprises a casing 20 through which is a cylindrical bore in which is a piston-21. 22 is a solid piston rodwhich constructed to form at its inner end avalve seat 111 al nement with the cylinder in which piston 21 slides, and at its other end a pipe connection 27. The valve seat iSC-lOSGdlOY a puppet valve-28 which is connected with, but spaced from, the piston. A pipe .29

(Fig. 1) connected at the end 27 of,member 26, communicates with the interior of the tank 10,

The casing 20 'is constructed to form two threaded ports 30;below the chamber 25,

either one of which may be closed bya plug 31 and the other connected with an air pres sure supply pipe 32. This construction makes it easy to lead the supply pipe to the more cgnvenient side of the device. ,-These ports 30 are connected with passages 38 which lead into the opposite sides, of the chamber 25 so that thepressureof the entering air does-not force the valve 28 to one side andthus cause undue friction. Furthermore, these passages are. placed as near to the seat of valve 28 as possible so; that the air entering splits on the puppetyalve and causes but little, longitudinal pressure upon this valve when it is open whichmight have a tendency tomake it creep shut. [When it is closed, however the air pressure'aids in holding it in its closed position asthe area.

of the puppet-valve 28 is Somewhat greater than that of the end of the :piston21.

ithin the casing 20back ofthe piston is,

the exhaust chamber. which is separated from the.pressure'chamberby the piston.

At this part the casingis constructed as shown in Fig. 5, to form twooppositely disposed threaded ports34l3 l*larger than. ports 30, one of which is closed by .a plug.

35 and were other is connected a pipe 36" which communicates with the pipe 29 and thus with the interior of tank 10. 3737 are passages from the communicating ports 34 to the main cylinder on opposite sides thereof.

Just forward of these passages is another somewhat narrower, which is shown in Fig. 2 of the drawings where it is designated by the reference numeral 38. This passage extends around the cylinder and communicates with a transverse chamber 39, which terminates in two threaded ports similar to 34, one of which is closed by a plug 40 and to the other of which is connected an air discharge pipe 41.

The arrangement of all of the ports is similar to that already described, so that the pipe connections may be made on either side of casing 20, and the passages connecting the ports with the cylinder are on both sides of the cylinder so that the air entering or leaving the cylinder does not tend to push the piston and its connected parts to one side or the other and thus cause undue friction.

Above the collar 24 the casing is constructed to form bearings for a transverse shaft 42 and a chamber 43 between the bearings, which chamber is closed by a removable cover 44. The part of shaft 42 between these bearings is squared to fit a similarly shaped hole in a swinging member 45, the lower edge of which is recessed to fit over collar 24, and the upper part of which is provided with a knob or handle 46.

The other end of shaft 42 is supported in a stationary bearing 47 outside of which is a projecting lug 48, which is preferably an integral part of the shaft. The member which forms the bearing 47 is removably supported in brackets 49 and the whole construction is such that w ien this member is removed the shaft 42 may be pulled out of the casing and inserted at will, it being only necessary in making such insertion to remove the cover 44 and to hold the swinging member 45 by its knob 46 in proper position to cause the hole in this member to register with the squared part of the shaft.

On the outside of the bearing member 47 is rotatably supported a rock lever 50, one end of which passes through a slot-likeeye in a top piece 51 affixed to the upper end of the rod 17, and the other end of which carries a weight 52 which counterbalances the weight of the rod 17 and its attached parts. This rock lever is constructed to form two spaced shoulders 5354.

55 is another lever which carries a weight 56. The lower end of lever 55 is forked and its forked ends are bored to fit over the bearing member 47 on opposite sides of the rock lever 50. The part of this lever 55 which is directly above the bearing member is'not high enough toclear the shoulders 5354 but is so arranged as to be engaged by one or the other of them as the rock lever is moved. l urthermore, that side of the forked portion of the lever 55 which is adjacent the lug 48 is constructed to form spaced shoulders 5758 which engage lug 48 as the lever 55 is moved.

I will now describe the operation of this apparatus. As the sewage collects in tank 10 the float 15 will rise on rod 17 until it reaches the upper stop 19, after which its further upward moven'ient will carry rod 17 and its top piece 51 with it. This will in turn raise the unweighted end of lever 50 until its shoulder 53 engages the adjacent end of lever 55, after which this too will move about its pivotal support. The parts are so adjusted that before the tank 10 becomes filled, the weighted lever 55 will be moved past its vertical position after which the weight 56 will carry it over a sufficient amount to cause its shoulder 57 to engage lug 48 and to rotate shaft 42 and swinging member 45 until the latter by its engagement with collar 24, moves piston 21 and its attached parts from the positions in which they are shown in Fig. 2, to the left, a lost motion being provided for between the shoulders 5354 and the part of lever 55 with which they engage and between the shoulders 5758 and the lug 48.

This movement of the piston and its at tached parts closes the port 38 and moves puppet valve 28 off from its seat. Gompressed air is then admitted from the supply pipe 82 through the two ports 33 3 through chamber 25 and pipe 29 into the tank 10. The pressure of the air is great enough to eject quickly, the sewage through pipe 14.

.Vhen the level of the sewage is decreased a suthcient amount to reverse the valve actuation already described, the piston 21 and its attached parts are moved back into the positions in which they are shown in Fig. 2. Now the compressed air is shut off and a connection is open from the tank through pipes 29 and 36, valve passages 37, port 38 to outlet pipe 41. These pipes and ports are of larger capacity than the intake pipes and ports so that the discharge of pressure is very rapid. lVloreover, the parts are so set that the valve is shifted before all of the sewage is forced out of the tank as the expansion of the air before the pressure is exhausted is depended upon to force out the last of the sewage.

In apparatus of this kind where the position of the float is constantly changing, it is important that the movement of the float shall not be imparted to the valve until the float has reached the predetermined positions in its path of travel; in other words, that the valve should not be affected by minor fluctuations of the float or of the rock-lever. It is also important that the valve motion itselfbe rapid and positive and its movements sensitive to control without being delicate in construction. All: of these results-are attained by-the apparatus herein shown and described.

By the use of this apparatus a very rapid operation is possible and large quantities of sewage disposed of quickly. The fact that the swinging member is in the exhaust side of the valve, the packing for shaft 42 need not be set up tightly and this has a further effect of making the valve sensitive in operation.

Furthermore, the fact that there is no packing gland on the pressure side of the de vice, makes it possible to avoid air leakages which might occur when the apparatus is not in use, which leakages in former structures would cause the automatically controlled air compressors whichare commonly used to supply the air pressure. to start to compensate for this loss by leakage, causing unnecessary noise and loss of efficiency.

Structural modifications may be made within the scope of this invention, and I intend that no limitations be imposed other than those indicated in the appended. claims.

lVhat I claim is:

1. In a sewage ejector, a pressure control valve, and means for actuating said valve comprising a rock shaft and a rock lever, independent bearings for said shaft and for said lever in axial alinement with each other, and an intermediate weighted lever arranged to be actuated by the rock lever and to actuate the rock shaft.

2. In a sewage ejector, apressnre control valve, and means for actuating said valve comprising a rock shaft'and a float-controlled rock lever, a member forming inclependent bearin gs for said shaft and for said lever in axial alinement with each other, and an intermediate weighted lever on said bearing member arranged to be actuated by the rock lever and to actuate the rock shaft.

3. In a sewage ejector, a pressure control valve, and means for actuating said valve comprising a rock shaft having one of its ends ionrn'aledin the valve, and a rock leverQa removable member forming a bearing for the other end of the shaft and an independent; bearing for the rock-lever and an independent weighted lever pivotally"supiorted on the part of the bearing member vhich forms the bearing for the rock shaft, arranged to be actuated by the rock lever and to actuate the rock-shaft, said rock shaft being removable from the valve when said bearing member is removed.

4. In a sewage ejector, a pressure control. valve, and means for actuating said valve comprising a rock shaft having one of its ends ournaled in the valve, a swinging member on said shaft within the valve, and a rock lever, a removable member forming a bearing for the other end of the shaft and an independent bearing for the rock lever and an independent weighted lever pivotally supported on the part ofthe bearing member which forms the .bearing for the rock shaft, arranged to be actuated by the rock lever-and to actuate the rock-shaft, said rockshaft being removable from the valve and from the swinging member whensaid bearing member is removed.

5'. In a sewage ejector, a pressure control valve having a casing, and means for actuating said valve comprising a rock shaft having one of its ends journaled in the valve cas ing, a swinging member on said shaft within the valve having a non-rotativeconnection with said shaft, and rock lever, a removablemember forming abearing for the other end of-the shaft and-an independent bearing for the rock lever and an independent weighted lever pivotally supported on the part of the bearing member which forms the bearing for the rock shaft, arranged tobe actuated by the rock lever and to actuate the rock-shaft, said rock-shaft being removable from the valve and from the swinging member when said bearing member is removed, said valve casing having a removable cover over said swinging member.

6. In a sewage ejector, a pressure control valve having a casing, a valvecylinder there in and a longitudinally movable piston valve in said cylinder, a rock-shaft j ournaled in said valve casing, a swinging member on said shaft within the valve casing having a non-rotative connection with said shaft and arranged'when swung with the shaft to move said piston valve, threaded interconnected ports on opposite sides of the valve casing, and passages from said ports to opposite sides of the valve cylinder arranged to be controlled by the piston valve, one pair of said passa 'es being connected with a chamber formed vithin the valve casing having an outletat the end of the valve casing, and a puppet valve connected with said piston valve and arranged to control said outlet.

' 7. In a sewage eje'cton-a pressure control valve havingacasing and a longitudinally movable valve member therein, a rock shaft journaled in said valve casing, a swinging member on said shaft within the valve casing having a non-rotative connection with said shaft and arranged when swung with the shaft, to move said valve member. a rock lever, a removable member forming a bearing for the other end of said shaft, and an independent bearing for the rock lever and an independent weighted lever pivotally supported on the part of the bearing member which forms the bearing for the rock shaft, arranged to be actuated by the rock lever and to actuate the rock shaft; threaded. interconnected ports on opposite sides of the valve casing and passages from said ports to opposite sides of said valve member, said ports being arranged to be controlled by the valve member.

8. In a sewage ejector, a pressure control valve having a casing and a longitudinally movable piston valve therein, a rock shaft journaled in said valve casing, a swinging member on said shaft within the valve casing having a non-rotative connection with said shaft and arranged when swung with the shaft to move said piston valve, a'rock lever, a removable member forming a bearing for the other end of the shaft and an independent bearing for the rock lever and an independent weighted lever pivotally supported on the part of the bearing memher which forms the bearing for the rock shaft arranged to be actuated by the rock lever and to actuate the rock shaft, said rock shaft being removable from the valve when said bearing member is removed; threaded interconnected ports on opposite sides of the valve casing and passages from said ports to opposite sides of said piston valve and arranged to be controlled by said piston valve. 7 i

9. In a sewage ejector, a pressure control valve having a casing and a longitudinally movable piston valve therein, a rock shaft journaled in said valve casing, a swinging member on said shaft within the valve casing having a non-rotative connection with said shaft and arranged when swung with the shaft to move said valve member, a floatactuated rock lever, a removable member forming a bearing for the shaft, and an independent bearing for the rock lever and an independent weighted lever pivotally supported on the part of the bearing member which forms the bearing for the rock shaft arranged to be actuated by the rocklever and to actuate the rock shaft, said rock shaft being removable from the valve when said bearing member is removed, said valve casing having a removable cover over said swinging member and having threaded interconnected ports on its opposite sides and passages from said ports to opposite sides of said piston valve, said ports being arranged and controlled by the piston valve,

one pair of said passages being connected with a chamber formed within the valve casing and having an outlet at the end of the valve casing, and a puppet valve connected with said piston valve of larger diameter than thediameter of the piston valve and arranged to control said outlet.

10. In a sewage ejector, a pressure control valve having a casing constructed to form a pressure chamber and a closed exhaust chamber, a longitudinally movable piston valve in said casing separating said chamhers, a valve seat at one end of the pressure chamber, a puppet valve, a solid reduced connection between the puppet valve and the piston valve, said longitudinally movable valve being arranged to cooperate with said valve seat, a solid rod projecting from the opposite end of said longitudinally movable valve through the exhaust chamber, a collar on said rod, and a rock shaft co operating with said collar and j ournaled in said casing and passing through a part thereof which forms the exhaust chamber.

11. In a sewage ejector, a pressure control valve having a casing constructed to form a pressure chamber and a closed exhaust chamber, a piston in said casing separating said chambers, a valve seat at one end of the pressure chamber, a puppet valve, a solid reduced connection between the puppet valve and the piston, said puppet valve being arranged to cooperate with said valve seat, a solid piston rod projecting from the opposite end of said piston through the exhaust chamber, and into the head of the valve casing, a collar on said piston rod, a rock shaft transverse to said rod journaled in said casing and passing through the part thereof which forms the exhaust chamber, apacking gland for said shaft, and

a swinging member on the rock shaft having a nonrotative connection therewith and said casing having a removable cover over the swinging member; said swinging member adapted to engage said collar to move the piston and its connected valve.

In witness whereof, I have hereunto set my hand this 27 day of December, 1915.

WILLIAM MGOLINTOCK.

Copies of this patent may be obtained for five cents each, by addressing'the Commissioner of Patents.

Washington, D. G. 

